body,
html {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: black;
}
.box {
  width: 500px;
  height: 500px;
  border: 1px solid black;
  position: relative;
}
.box div {
  width: 400px;
  height: 400px;
  background-color: pink;
  opacity: 0.5;
  border-radius: 400px 0 400px 0;
  transform-origin: left bottom;
  transform: rotate(-45deg);
  transition: transform 2s;
  position: absolute;
  bottom: 0;
  left: 50%;
}
.box:hover div:nth-child(2) {
  transform: rotate(45deg);
}
.box:hover div:nth-child(3) {
  transform: rotate(15deg);
}
.box:hover div:nth-child(4) {
  transform: rotate(-15deg);
}
.box:hover div:nth-child(5) {
  transform: rotate(-75deg);
}
.box:hover div:nth-child(6) {
  transform: rotate(-105deg);
}
.box:hover div:nth-child(7) {
  transform: rotate(-130deg);
}
